Forearm Flexors

Question 1

Flexor digitorum superficialis - Origin

Answer 1

Humeroulnar head:

1. Medial epicondyle of humerus via. Common flexor tendon
2. Coronoid process of ulna

Radial head:
1. Proximal 1/2 of anterior shaft of radius (distal to radial tuberosity)

Question 2

Flexor digitorum superficialis - insertion

Answer 2

Anterior surface of adjacent sides of middle phalanges of fingers 2-5

Question 3

Flexor digitorum superficialis - actions

Answer 3

1. Flexion of fingers 2-5 at MCP and PIP joints
2. Flexion of hand at wrist joint
3. Flexion of forearm at elbow joint

Question 4

Flexor digitorum superficialis - innervation

Answer 4

Median nerve

Question 5

Flexor digitorum superficialis - arterial supply

Answer 5

Ulnar and radial arteries

Question 6

Flexor digitorum profunds - origin

Answer 6

1. Medial anterior surface of proximal 1/2 of ulna

2. Interosseous membrane

Question 7

Flexor digitorum profunds - insertion

Answer 7

Anterior surface of distal phalanges of fingers 2-5

Question 8

Flexor digitorum profundus - actions

Answer 8

1. Flexion of fingers 2-5 at MCP, PIP and DIP joints

2. Flexion of hand at wrist joint

Question 9

Flexor digitorum profundus - innervation

Answer 9

Median and ulnar nerves

Question 10

Flexor digitorum profundus - arterial supply

Answer 10

Ulnar, radial and interosseous arteries

Question 11

Flexor pollicis longus - origin

Answer 11

1. Anterior surface of radius
2. Interosseous membrane
3. Medial epicondyle of humerus
4. Coronoid process of ulna

Question 12

Flexor pollicis longus - insertion

Answer 12

Anterior aspect of base of distal phalanx of thumb

Question 13

Flexor pollicis longus - actions

Answer 13

1. Flexion of thumb at CMC, MCP and IP joints
2. Flexion of hand at wrist joint
3. Radial deviation of hand at wrist joint
4. Flexion of forearm at elbow joint
5. Pronation of forearm at radioulnar joint

Question 14

Flexor pollicis longus - innervation

Answer 14

Median nerve

Question 15

Flexor pollicis longus - arterial supply

Answer 15

Radial and anterior interosseous arteries

Question 16

Palmaris longus - origin

Answer 16

Medial epicondyle of humer via. Common flexor tendon

Question 17

Palmaris longus - insertion

Answer 17

1. Palmar aponerosis

2. Flexor returnaculum

Question 18

Palmaris longus - actions

Answer 18

1. Flexion of hand at wrist joint
2. Ulnar deviation of hand at wrist joint
3. Radial deviation of hand at wrist joint
4. Flexion of forearm at elbow joint
5. Pronation of forearm at radioulnar joint
6. Wrinkling of skin of palm

Question 19

Palmaris longus - innervation

Answer 19

Median nerve

Question 20

Palmaris longus - arterial supply

Answer 20

Ulnar artery

Question 21

Pronator quadratus - origin

Answer 21

Anterior distal 1/4 of ulna

Question 22

Pronator quadratus - insertion

Answer 22

Anterior distal 1/4 of radius

Question 23

Pronator quadratus - action

Answer 23

Pronation of forearm at radioulnar joint

Question 24

Pronator quadratus - arterial supply

Answer 24

Anterior interosseous artery